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problems with loop in R

  • 28-10-2011 12:10PM
    #1
    b00mIR
    Registered Users, Registered Users 2 Posts: 26 ✭


    Hi
    i am looking for some help in figuring out the problem with my R script, i'm trying to look through a set of paired values in a matrix and randomize them. the following is what i've written


    for (i in 1:29412) for (j in 1:899/2) #the second length in j is halved for a reason seen later in the script
    {
    if(ped[i,2*j-1]==ped[i,2*j]) #this selects my columns in pairs
    next
    else if (random==1) #random = sample(1:0,1)
    ped[i,2*j-1]->x ; ped[i,2*j]->y ; y->ped[i,2*j-1] ; x->ped[i,2*j] #ped is my martix of interest
    else break
    }

    the following is the error i'm getting


    > for (i in 1:29412) for (j in 1:899/2)
    + {
    + if(ped[i,2*j-1]==ped[i,2*j])
    + next
    + else
    + if (random==1)
    + ped[i,2*j-1]->x ; ped[i,2*j]->y ; y->ped[i,2*j-1] ; x->ped[i,2*j]
    + else break
    Error: unexpected 'else' in:
    "ped[i,2*j-1]->x ; ped[i,2*j]->y ; y->ped[i,2*j-1] ; x->ped[i,2*j]
    else"
    > }
    Error: unexpected '}' in "}"
    >
    Tagged:


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